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The characteristics of a budding entrepreneur: passion, tenacity, and a willingness to work hard, are essential.We also recommend you join the class with at least a rough idea of a business model for a startup you would like to work on throughout this class.A web application may wish to employ message layer security using schemes such as off-the-record (OTR) messaging, even when these messages have been securely received, such as over TLS.The Web Cryptography API enables OTR and similar message signing schemes, by allowing key agreement to be performed.Previously, when data was added to the cache, it would have been signed by the server with the corresponding private key.By validating the signature when restoring data from the cache, the client ensures that the cached data has not been tampered with.When a user agent navigates to such a web application, the application would send the encrypted form of the document.The user agent is then instructed to unwrap the encryption key, using the user's private key, and from there, decrypt and display the document.

Using the Web Cryptography API, the application may have a user select a private or secret key, optionally derive an encryption key from the selected key, encrypt the document, and then upload the encrypted data to the service provider using existing APIs.

This specification describes a Java Script API for performing basic cryptographic operations in web applications, such as hashing, signature generation and verification, and encryption and decryption.

Additionally, it describes an API for applications to generate and/or manage the keying material necessary to perform these operations.

Uses for this API range from user or service authentication, document or code signing, and the confidentiality and integrity of communications.

This section describes the status of this document at the time of its publication. A list of current W3C publications and the latest revision of this technical report can be found in the W3C technical reports index at https:// An implementation report is also available (as well as reports sent to the mailing list).

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